Aviation Dictionary

On this page you will find a searchable and comprehensive alphabetical list of aviation terms. You can help us make it the most comprehensive list in the world. If we have missed anything, click on the ‘send us your word’ button to send us your word, acronym or definition and we will consider adding it to our dictionary.

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Altimeter

An instrument that gives a reading of height in feet. The setting is based off of a pressure setting, in hectopascals (hPa) and the height shown can vary depending on what reading is required. Common readings will be set for Above Mean Sea Level (AMSL), Above Ground Level (AGL), or can be set for a Flight Level with the standard QNH setting of 1013 hPa.

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